y=x^3-4x eching

$$y= { x }^{ 3 } -4x$$

x uchun yechish (complex solution)

$$x=-\frac{3\times \left(\frac{2}{9}\right)^{\frac{2}{3}}\left(1+\sqrt{3}i\right)\left(\sqrt{3\left(27y^{2}-256\right)}+9y\right)^{-\frac{1}{3}}\left(3\left(-\sqrt{3}i-1\right)\times \left(\frac{\sqrt{3\left(27y^{2}-256\right)}+9y}{9}\right)^{\frac{2}{3}}+8\times 2^{\frac{2}{3}}\right)}{8}$$

$$x=\frac{3\times \left(\frac{2}{9}\right)^{\frac{2}{3}}\left(\sqrt{3\left(27y^{2}-256\right)}+9y\right)^{-\frac{1}{3}}\left(3\times \left(\frac{\sqrt{3\left(27y^{2}-256\right)}+9y}{9}\right)^{\frac{2}{3}}+4\times 2^{\frac{2}{3}}\right)}{2}$$

$$x=-\frac{3\times \left(\frac{2}{9}\right)^{\frac{2}{3}}\left(-\sqrt{3}i+1\right)\left(\sqrt{3\left(27y^{2}-256\right)}+9y\right)^{-\frac{1}{3}}\left(3\left(-1+\sqrt{3}i\right)\times \left(\frac{\sqrt{3\left(27y^{2}-256\right)}+9y}{9}\right)^{\frac{2}{3}}+8\times 2^{\frac{2}{3}}\right)}{8}$$

y uchun yechish

$$y=x\left(x^{2}-4\right)$$